AP EAMCET · Maths · Sequences and Series
If up to terms, up to terms and up to terms, then
- A
- B
- C
- D
Answer & Solution
Correct Answer
(C)
Step-by-step Solution
Detailed explanation
a=1+2+4+8+...+ upto n terms a=2n-1 b=1+3+9+...+ upto n terms ⇒b=3n-12 ⇒2b=3n-1 c=1+5+25+... t upto n terms ⇒c=5n-14 4c=5n-1 ∆=2n-13n-15n-12222n3n5n ∆=2n3n5n2222n3n5n-21111112n3n5n by splitting the determinant into two along the first row.…
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