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Let {ak} and {bk},k epsilon N, be two G....

Let `{a_k}` and `{b_k}`,`k epsilon N`, be two G.P.s with common ratios `r_1` and `r_2` respectively such that `a_1 = b_1 = 4` and `r_1lt r_2`.Let `c_k=a_k+b_k`,.k`epsilon`N.If `C_2`=5 and `C_3`=`13/4` then `sum_(k=I)^oo c_k-(12a_6+8b_4) ` is equal to

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JEE MAINS PREVIOUS YEAR-JEE MAINS 2023 JAN ACTUAL PAPER-Question
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