Write 4.651x 10^6 as an ordinary number.
1 answer:
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Answer:
Option (3)
Step-by-step explanation:
Explicit formula of the sequence is,
From this explicit formula,
First term of the sequence will be,
Second term of the sequence,
= 13
3rd term of the sequence,
= 31
Sequence formed,
7, 13, 31 ..........
From the given options,
Recursive formula,
= 13
= 39 - 8
= 31
Sequence formed from this recursive formula will be,
7, 13, 31........
Therefore, Option (3) will be the answer.
$\implies 2^{2x}-2\cdot5^{2x}-(2^x)(5^x)>0$
let $2^x=a$ and $5^x=b$
So, $a^2-2b^2-ab>0$
divide by $b^2$, ($b^2>0$)
$\implies \left(\frac ab\right)^2-\left(\frac ab\right) -2>0$
this is a quadratic, in $\left(\frac ab\right)$, let it be $x$
So, $x^2-x-2>0$
Can you simplify it now?