Find the 9th term of the geometric sequence 9, -18, 36...
2 answers:
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<span>Solutions
1) Equation
</span>⇒ <span><span>(<span><span>2x</span>+3</span>)</span><span>(<span>x−4</span>)
</span></span>⇒<span><span>(<span><span>2x</span>+3</span>)</span><span>(<span>x+<span>−4</span></span>)
</span></span>⇒<span>(2x)(x)+(2x)(−4)+(3)(x)</span>+<span>(3)(−4)
</span>⇒2
<span><span><span>−<span>8x</span></span>+<span>3x</span></span>−12
</span>⇒2 <span><span>−<span>5x</span></span>−<span>12
Answer - </span></span>2 <span>−5x−12</span><span>
</span>
1) Equation
</span>⇒ <span><span>(<span><span>2x</span>+3</span>)</span><span>(<span>x−4</span>)
</span></span>⇒<span><span>(<span><span>2x</span>+3</span>)</span><span>(<span>x+<span>−4</span></span>)
</span></span>⇒<span>(2x)(x)+(2x)(−4)+(3)(x)</span>+<span>(3)(−4)
</span>⇒2
</span>⇒2
Answer - </span></span>2
</span>