jee-main 2020 Q53

jee-main · India · session2_06sep_shift2 Arithmetic Sequences and Series Find Common Difference from Given Conditions
The common difference of the A.P. $b_{1},b_{2},\ldots,b_{m}$ is 2 more than common difference of A.P. $\mathrm{a}_{1},\mathrm{a}_{2},\ldots,\mathrm{a}_{\mathrm{n}}$. If $\mathrm{a}_{40}=-159,\mathrm{a}_{100}=-399$ and $\mathrm{b}_{100}=\mathrm{a}_{70}$, then $\mathrm{b}_{1}$ is equal to:
(1) 81
(2) $-127$
(3) $-81$
(4) 127 
The common difference of the A.P. $b_{1},b_{2},\ldots,b_{m}$ is 2 more than common difference of A.P. $\mathrm{a}_{1},\mathrm{a}_{2},\ldots,\mathrm{a}_{\mathrm{n}}$. If $\mathrm{a}_{40}=-159,\mathrm{a}_{100}=-399$ and $\mathrm{b}_{100}=\mathrm{a}_{70}$, then $\mathrm{b}_{1}$ is equal to:\\
(1) 81\\
(2) $-127$\\
(3) $-81$\\
(4) 127
Paper Questions
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