Asequence is defined recursively using the formula f(n + 1) = -0.5f(n). if the first term of the sequence is 120, what is f(5)?
-15
-7.5
7.5
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m∠abd = m∠dbc

step-by-step explanation:

given : ab bisects ∠dbc

as we know that bisection means ab divides   ∠dbc   in two equal angles named as   ∠dba and   ∠abc

so, m∠abd = m∠dbc  

because ab bisects ∠dbc.

hence , the first statement m∠abd = m∠dbc is true.