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10th-13th grade
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![search-thumbnail-[RRB TC/CC 2005] 58. $--$ $11^{,20^{'}22}$
तो $c+\dfrac {1} {a}=7$ (a) $\dfrac {7} {11},\dfrac {16} {20},\dfrac {21} {22}$ (b) $\dfrac {21} {22},\dfrac {7} {11},\dfrac {16} {20}$ (c) $\dfrac {21} {22},\dfrac {16} {20}'^{\dfrac {7} {11}}$ (d) $--'20$ $11^{,}$ $22$
[RRC कोलकाता, 2013)
1 (d) 2
$/RRC$ हाजीपुर, 2014) 59. यदि $1+2+3+$ ... $+20=210$ हो. तो $1^{3}+2^{3}+3^{3}+...+20^{3}$ का
मान है-- $44,100$
$\left(3x-5\right)$ (a) $10,500$ (b) $21,000$ (c) $44,0O0$ [RRB (d) TC/CC 2005]
$1^{2}-2^{2}+3^{2}-4^{2}+5^{2}-6^{2}+7^{2}-8^{2}+9^{2}-10^{2}=7$
$\left(x+1\right)$ $\left(RRB$ (d) TC/CC 2006] 60. (a) 45 (b) 55 (c) -55 (d) -45
r + v) (r – 27) (RRC हाजीपुर, 2014)](https://thumb.mathpresso.io/qanda-ai-image-prod/30a13dd56d2a4a01ab8cc5a3976dfe59.jpg)
![search-thumbnail-[RRB TC/CC 2005] 58. $--$ $11^{,20^{'}22}$
तो $c+\dfrac {1} {a}=7$ (a) $\dfrac {7} {11},\dfrac {16} {20},\dfrac {21} {22}$ (b) $\dfrac {21} {22},\dfrac {7} {11},\dfrac {16} {20}$ (c) $\dfrac {21} {22},\dfrac {16} {20}'^{\dfrac {7} {11}}$ (d) $--'20$ $11^{,}$ $22$
[RRC कोलकाता, 2013)
1 (d) 2
$/RRC$ हाजीपुर, 2014) 59. यदि $1+2+3+$ ... $+20=210$ हो. तो $1^{3}+2^{3}+3^{3}+...+20^{3}$ का
मान है-- $44,100$
$\left(3x-5\right)$ (a) $10,500$ (b) $21,000$ (c) $44,0O0$ [RRB (d) TC/CC 2005]
$1^{2}-2^{2}+3^{2}-4^{2}+5^{2}-6^{2}+7^{2}-8^{2}+9^{2}-10^{2}=7$
$\left(x+1\right)$ $\left(RRB$ (d) TC/CC 2006] 60. (a) 45 (b) 55 (c) -55 (d) -45
r + v) (r – 27) (RRC हाजीपुर, 2014)](https://thumb.mathpresso.io/qanda-ai-image-prod/30a13dd56d2a4a01ab8cc5a3976dfe59.jpg?target_format=webp&width=662)